Motor's power

[fabiodl]

I was looking at a motor, specifically this
https://www.aliexpress.com/item/DC-12V-150W-13000-15000rpm-775-motor-High-speed-Large-torque-DC-motor-Electric-tool-Electric/32813102823.html

The rated current is 0.32A. The rated output power is 150W.
At 12V, a current of 0.32A gives 3.84W of input power. Which is nearly two orders of magnitude lower than the rated output power, and losses are not considered.
My guess is that the power is limited to instantaneous conditions. However, is it normal to express the motor power in this way?
What should I search for if I want to continuously have (possibly with a gear box) 1000rpm, 0.5 Nm ?

[joeqsmith]

They don't give you much do they.  Not even mechanical dimensions that I could find.  I believe the 150W output power.  I would think they would give you at what RPM you have the 150W. 

I've got a little 70W toy motor I was playing with. At 14,000RPM, they claim 53% efficient. I would expect your motor to draw several Amps. 

[Awesome14]

In the United States, motor output power is = input power x efficiency. Obviously, Chinese ratings are a bit on the optimistic side. I purchase a 800mW diode laser from a Chinese dealer, and it's actual output is 10mW.

In China, anything metallic gold colored can be sold under the name gold. So, many supposedly gold plated connectors from China are not really gold plated. On eBay, Chinese dealers are required to comply to American/Western European labeling practices.

[schenkzoola]

I suspect the 0.32 amps is a typo.  It is probably more likely 32 amps.  Despite the cooling fan, I would not expect that to be continuous duty at 150W output.  It has the appearance of a typical cordless tool motor.

[rstofer]

The specs say it is brushless.  Really?
Somehow I got the idea that brushless motors were 3 phase yet this motor has only 2 terminals.

The specs also say the motor is totally enclosed but the pictures on the linked page don't show an enclosed motor.

I probably have this wrong...

[fabiodl]

Thank everybody. Indeed, it does not seem brushless to me either.
I didn't think about a typo, but yes, 32amps (instantaneous) seem a much more reasonable figure.
I would like to think 150W is real, but isn't it too cheap?

[viperidae]

Maybe 0.32A no load current?
It's definitely not brushless either.

[joeqsmith]

Looking at the motor current for the toy 70W motor, I was doing pulls up to 17A.  Does seem like a typo on the decimal point.   

[james_s]

I suspect most of the specs are probably just copy/pasted from somewhere and have little basis in reality. Certainly you cannot get more mechanical energy out of the motor than you put in electrically. The current will vary with load but even at no load I would expect it to pull more than .32A.  It's definitely not a brushless motor, you can see the brushes through the cooling slots.

[Audioguru]

Ali is a Chinese website. Their sellers know nothing about Engrish, erectronics or erectricity.
Of course the motor has brushes that soon wear out and might be able to provide 50W for a few seconds at 9A.